I have no idea how such a great open-source game as Teeworlds has been able to exist without me hearing about it until recently.
Teeworlds is a fast-paced realtime multiplayer shooter. You control a small "Tee" which can hold various weapons (hammer, gun, shotgun, laser-rifle, rocket launcher, ninja-sword) while running and jumping around frantically on the map, trying to frag as many other Tees as you can before you're killed by some other guy. Easy, eh?
There's are many game servers to choose from, as well as various game modes (death match, team death match, capfure the flag and some unofficial "mods"). You can join servers on the Internet, or create your own server, be it a public one or a LAN server.
Usually I would suggest apt-get install teeworlds, but for now the packages in unstable are an older 0.4.x version, whereas upstream released a much-improved 0.5.1 version. I have already filed a bug and I'm optimistic there'll be a new version in unstable soon.
In the mean-time however, you can manually build the game from source via:
$ apt-get install zlib-dev libsdl1.2-dev (maybe also libgl, libglu, and python, if not already installed) $ wget 'http://teeworlds.com/trac/bam/browser/releases/bam-0.2.0.zip?format=raw' -O bam-0.2.0.zip $ wget http://teeworlds.com/files/teeworlds-0.5.1-src.zip $ unzip bam-0.2.0.zip $ unzip teeworlds-0.5.1-src.zip $ cd bam-0.2.0 $ ./make_unix.sh $ cd ../teeworlds-0.5.1-src $ ../bam-0.2.0/src/bam release
You'll obviously need a working OpenGL/DRI setup (check if "glxinfo | grep direct" says "Yes"), otherwise the game will be way too slow. In case you experience graphics glitches and distortions, first exit the game, then:
$ vi ~/.teeworlds/settings.cfg
Change the "gfx_noclip 0" option there to "gfx_noclip 1" and restart the game.
If you use a local firewall as I do, you need to open at least ports 8300-8303 (UDP), even better 8300-8310 for more choice in game servers:
$ iptables -A OUTPUT -m state --state NEW -p udp --dport 8300:8310 -j ACCEPT
Although I'm not a "gamer", I enjoy playing computer games from time to time. First-person shooters are especially well-suited for relaxing after a long and exhausting day ;-)
IMHO a very good choice, if you're looking for a fun Free Software first-person shooter running on Linux, is Nexuiz.
Nexuiz version 1.5 has recently been released, which features new maps, new characters, better AI and lots more. Check it out!